由TXT文件路径，读取并显示该TXT文件

private String loadData(String path){        File file = new File(path);        BufferedReader br = null;        StringBuffer sb = new StringBuffer();        try{            br  = new BufferedReader(new FileReader(file));            String line = "";            while ((line = br.readLine()) != null){                sb.append(line);                sb.append('\n');            }            br.close();        }catch (Exception e){            e.printStackTrace();        }        return sb.toString();    }

最后返回的就是TXT文件内容。